package EstimatorPackage.Expressions;

/**
 * Interface for the diffent kind of expepression.
 * @author Martin Haulrich
 */
public interface Expression {

    public final static int EMPTY = 0;

    public final static int SIMPLE = 1;

    public final static int COMPLEX = 2;

    public final static int LIST = 3;


    /**
     * Returns number identifying the type of the expression.
     * @return Number identifying the type of the expression.
     */
    public int type();
}
